From: Ryan Libby <rli...@freebsd.org> That is, provide wrappers around the atomic_testandclear and atomic_testandset primitives.
Submitted by: jeff Reviewed by: cem, kib, markj Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D22702 --- newlib/libc/sys/rtems/include/sys/bitset.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/newlib/libc/sys/rtems/include/sys/bitset.h b/newlib/libc/sys/rtems/include/sys/bitset.h index 3f263acd0..913fa290d 100644 --- a/newlib/libc/sys/rtems/include/sys/bitset.h +++ b/newlib/libc/sys/rtems/include/sys/bitset.h @@ -176,6 +176,12 @@ (d)->__bits[__i] = (s1)->__bits[__i] ^ (s2)->__bits[__i];\ } while (0) +/* + * Note, the atomic(9) API is not consistent between clear/set and + * testandclear/testandset in whether the value argument is a mask + * or a bit index. + */ + #define BIT_CLR_ATOMIC(_s, n, p) \ atomic_clear_long(&(p)->__bits[__bitset_word(_s, n)], \ __bitset_mask((_s), n)) @@ -188,6 +194,14 @@ atomic_set_acq_long(&(p)->__bits[__bitset_word(_s, n)], \ __bitset_mask((_s), n)) +#define BIT_TEST_CLR_ATOMIC(_s, n, p) \ + (atomic_testandclear_long( \ + &(p)->__bits[__bitset_word((_s), (n))], (n)) != 0) + +#define BIT_TEST_SET_ATOMIC(_s, n, p) \ + (atomic_testandset_long( \ + &(p)->__bits[__bitset_word((_s), (n))], (n)) != 0) + /* Convenience functions catering special cases. */ #define BIT_AND_ATOMIC(_s, d, s) do { \ __size_t __i; \ -- 2.35.3 _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
